diff --git a/changelog/3554.bugfix b/changelog/3554.bugfix
new file mode 100644
index 000000000..4a10d71ee
--- /dev/null
+++ b/changelog/3554.bugfix
@@ -0,0 +1 @@
+Allow ``CallInfo`` to have an unfinished state represented by having a ``None`` value in the ``result`` attribute.
diff --git a/src/_pytest/runner.py b/src/_pytest/runner.py
index ef1a0e694..b8ba70fa0 100644
--- a/src/_pytest/runner.py
+++ b/src/_pytest/runner.py
@@ -194,6 +194,7 @@ class CallInfo(object):
         #: "teardown", "memocollect"
         self.when = when
         self.start = time()
+        self.result = None
         try:
             self.result = func()
         except KeyboardInterrupt:
diff --git a/testing/test_runner.py b/testing/test_runner.py
index 26493de6e..9085dbe9a 100644
--- a/testing/test_runner.py
+++ b/testing/test_runner.py
@@ -473,7 +473,7 @@ def test_callinfo():
     assert "result" in repr(ci)
     ci = runner.CallInfo(lambda: 0 / 0, "123")
     assert ci.when == "123"
-    assert not hasattr(ci, "result")
+    assert ci.result is None
     assert ci.excinfo
     assert "exc" in repr(ci)